NPK absorption levels and potato crop yield as a function of dose and fractional fertilization method

Pinedo-Taco R.; Olivas Alvarado T. · Idesia (2023) · DOI: 10.4067/s0718-34292023000400021

Resumen

Potato crop has a high extractive capacity for nutrients from the soil and yields depend on the availability and extraction efficiency of fertilizers. The objective was to determine the levels of nutrient absorption based on the fertilization dose, application methods and their effect on the yield of the INIA 303-Canchán cultivar. The experiment was established under a randomized complete block design in a 2x2 factorial arrangement, four treatments and five repetitions. The factors under study were two fertilization levels (270-200-25270-200-250 and 270-120-250 kg ha-1 of NPK with two application methods (unfractionated and fractionated). Five tissue samplings were carried out plant to evaluate the accumulation of dry matter and the distribution of N, P2O5, K2O, in leaves, stems, roots and tubers. With fractional fertilization and doses of 270-120-250 kg ha–1, the highest absorption of NPK (K > N > P) and the highest total yield and highest commercial yield, (45.80 t ha–1 and 37.83 t ha–1); for each ton produced the amount of NPK extracted was 3.31, 0.58 and 5.22 kg respectively.

Instituciones: Universidad Nacional Agraria La Molina